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replicant-frameworks_native/cmds/installd/commands.c
Brian Carlstrom 021843c78d am 8ce28672: Merge "Make system use patchoat to relocate during runtime." 
* commit '8ce28672106956eeff6d0ed2d1d826ec192e58ee':
  Make system use patchoat to relocate during runtime.
2014-08-05 21:00:09 +00:00

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/*
** Copyright 2008, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include <inttypes.h>
#include <sys/capability.h>
#include "installd.h"
#include <diskusage/dirsize.h>
#include <selinux/android.h>
/* Directory records that are used in execution of commands. */
dir_rec_t android_data_dir;
dir_rec_t android_asec_dir;
dir_rec_t android_app_dir;
dir_rec_t android_app_private_dir;
dir_rec_t android_app_lib_dir;
dir_rec_t android_media_dir;
dir_rec_array_t android_system_dirs;
int install(const char *pkgname, uid_t uid, gid_t gid, const char *seinfo)
{
char pkgdir[PKG_PATH_MAX];
char libsymlink[PKG_PATH_MAX];
char applibdir[PKG_PATH_MAX];
struct stat libStat;
if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
ALOGE("invalid uid/gid: %d %d\n", uid, gid);
return -1;
}
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
ALOGE("cannot create package path\n");
return -1;
}
if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, 0)) {
ALOGE("cannot create package lib symlink origin path\n");
return -1;
}
if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
ALOGE("cannot create package lib symlink dest path\n");
return -1;
}
if (mkdir(pkgdir, 0751) < 0) {
ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
return -1;
}
if (chmod(pkgdir, 0751) < 0) {
ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
unlink(pkgdir);
return -1;
}
if (lstat(libsymlink, &libStat) < 0) {
if (errno != ENOENT) {
ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
return -1;
}
} else {
if (S_ISDIR(libStat.st_mode)) {
if (delete_dir_contents(libsymlink, 1, NULL) < 0) {
ALOGE("couldn't delete lib directory during install for: %s", libsymlink);
return -1;
}
} else if (S_ISLNK(libStat.st_mode)) {
if (unlink(libsymlink) < 0) {
ALOGE("couldn't unlink lib directory during install for: %s", libsymlink);
return -1;
}
}
}
if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) {
ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
unlink(libsymlink);
unlink(pkgdir);
return -errno;
}
if (symlink(applibdir, libsymlink) < 0) {
ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, applibdir,
strerror(errno));
unlink(pkgdir);
return -1;
}
if (chown(pkgdir, uid, gid) < 0) {
ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
unlink(libsymlink);
unlink(pkgdir);
return -1;
}
return 0;
}
int uninstall(const char *pkgname, userid_t userid)
{
char pkgdir[PKG_PATH_MAX];
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid))
return -1;
remove_profile_file(pkgname);
/* delete contents AND directory, no exceptions */
return delete_dir_contents(pkgdir, 1, NULL);
}
int renamepkg(const char *oldpkgname, const char *newpkgname)
{
char oldpkgdir[PKG_PATH_MAX];
char newpkgdir[PKG_PATH_MAX];
if (create_pkg_path(oldpkgdir, oldpkgname, PKG_DIR_POSTFIX, 0))
return -1;
if (create_pkg_path(newpkgdir, newpkgname, PKG_DIR_POSTFIX, 0))
return -1;
if (rename(oldpkgdir, newpkgdir) < 0) {
ALOGE("cannot rename dir '%s' to '%s': %s\n", oldpkgdir, newpkgdir, strerror(errno));
return -errno;
}
return 0;
}
int fix_uid(const char *pkgname, uid_t uid, gid_t gid)
{
char pkgdir[PKG_PATH_MAX];
struct stat s;
int rc = 0;
if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
ALOGE("invalid uid/gid: %d %d\n", uid, gid);
return -1;
}
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
ALOGE("cannot create package path\n");
return -1;
}
if (stat(pkgdir, &s) < 0) return -1;
if (s.st_uid != 0 || s.st_gid != 0) {
ALOGE("fixing uid of non-root pkg: %s %" PRIu32 " %" PRIu32 "\n", pkgdir, s.st_uid, s.st_gid);
return -1;
}
if (chmod(pkgdir, 0751) < 0) {
ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
unlink(pkgdir);
return -errno;
}
if (chown(pkgdir, uid, gid) < 0) {
ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
unlink(pkgdir);
return -errno;
}
return 0;
}
static int lib_dir_matcher(const char* file_name, const int is_dir) {
return is_dir && !strcmp(file_name, "lib");
}
int delete_user_data(const char *pkgname, userid_t userid)
{
char pkgdir[PKG_PATH_MAX];
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid))
return -1;
/* delete contents, excluding "lib", but not the directory itself */
return delete_dir_contents(pkgdir, 0, &lib_dir_matcher);
}
int make_user_data(const char *pkgname, uid_t uid, userid_t userid, const char* seinfo)
{
char pkgdir[PKG_PATH_MAX];
char applibdir[PKG_PATH_MAX];
char libsymlink[PKG_PATH_MAX];
struct stat libStat;
// Create the data dir for the package
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid)) {
return -1;
}
if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userid)) {
ALOGE("cannot create package lib symlink origin path\n");
return -1;
}
if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
ALOGE("cannot create package lib symlink dest path\n");
return -1;
}
if (mkdir(pkgdir, 0751) < 0) {
ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
return -errno;
}
if (chmod(pkgdir, 0751) < 0) {
ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
unlink(pkgdir);
return -errno;
}
if (lstat(libsymlink, &libStat) < 0) {
if (errno != ENOENT) {
ALOGE("couldn't stat lib dir for non-primary: %s\n", strerror(errno));
unlink(pkgdir);
return -1;
}
} else {
if (S_ISDIR(libStat.st_mode)) {
if (delete_dir_contents(libsymlink, 1, NULL) < 0) {
ALOGE("couldn't delete lib directory during install for non-primary: %s",
libsymlink);
unlink(pkgdir);
return -1;
}
} else if (S_ISLNK(libStat.st_mode)) {
if (unlink(libsymlink) < 0) {
ALOGE("couldn't unlink lib directory during install for non-primary: %s",
libsymlink);
unlink(pkgdir);
return -1;
}
}
}
if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) {
ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
unlink(libsymlink);
unlink(pkgdir);
return -errno;
}
if (symlink(applibdir, libsymlink) < 0) {
ALOGE("couldn't symlink directory for non-primary '%s' -> '%s': %s\n", libsymlink,
applibdir, strerror(errno));
unlink(pkgdir);
return -1;
}
if (chown(pkgdir, uid, uid) < 0) {
ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
unlink(libsymlink);
unlink(pkgdir);
return -errno;
}
return 0;
}
int make_user_config(userid_t userid)
{
if (ensure_config_user_dirs(userid) == -1) {
return -1;
}
return 0;
}
int delete_user(userid_t userid)
{
int status = 0;
char data_path[PKG_PATH_MAX];
if ((create_user_path(data_path, userid) != 0)
|| (delete_dir_contents(data_path, 1, NULL) != 0)) {
status = -1;
}
char media_path[PATH_MAX];
if ((create_user_media_path(media_path, userid) != 0)
|| (delete_dir_contents(media_path, 1, NULL) != 0)) {
status = -1;
}
char config_path[PATH_MAX];
if ((create_user_config_path(config_path, userid) != 0)
|| (delete_dir_contents(config_path, 1, NULL) != 0)) {
status = -1;
}
return status;
}
int delete_cache(const char *pkgname, userid_t userid)
{
char cachedir[PKG_PATH_MAX];
if (create_pkg_path(cachedir, pkgname, CACHE_DIR_POSTFIX, userid))
return -1;
/* delete contents, not the directory, no exceptions */
return delete_dir_contents(cachedir, 0, NULL);
}
int delete_code_cache(const char *pkgname, userid_t userid)
{
char codecachedir[PKG_PATH_MAX];
if (create_pkg_path(codecachedir, pkgname, CODE_CACHE_DIR_POSTFIX, userid))
return -1;
/* delete contents, not the directory, no exceptions */
return delete_dir_contents(codecachedir, 0, NULL);
}
/* Try to ensure free_size bytes of storage are available.
* Returns 0 on success.
* This is rather simple-minded because doing a full LRU would
* be potentially memory-intensive, and without atime it would
* also require that apps constantly modify file metadata even
* when just reading from the cache, which is pretty awful.
*/
int free_cache(int64_t free_size)
{
cache_t* cache;
int64_t avail;
DIR *d;
struct dirent *de;
char tmpdir[PATH_MAX];
char *dirpos;
avail = data_disk_free();
if (avail < 0) return -1;
ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail);
if (avail >= free_size) return 0;
cache = start_cache_collection();
// Collect cache files for primary user.
if (create_user_path(tmpdir, 0) == 0) {
//ALOGI("adding cache files from %s\n", tmpdir);
add_cache_files(cache, tmpdir, "cache");
}
// Search for other users and add any cache files from them.
snprintf(tmpdir, sizeof(tmpdir), "%s%s", android_data_dir.path,
SECONDARY_USER_PREFIX);
dirpos = tmpdir + strlen(tmpdir);
d = opendir(tmpdir);
if (d != NULL) {
while ((de = readdir(d))) {
if (de->d_type == DT_DIR) {
const char *name = de->d_name;
/* always skip "." and ".." */
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
strcpy(dirpos, name);
//ALOGI("adding cache files from %s\n", tmpdir);
add_cache_files(cache, tmpdir, "cache");
} else {
ALOGW("Path exceeds limit: %s%s", tmpdir, name);
}
}
}
closedir(d);
}
// Collect cache files on external storage for all users (if it is mounted as part
// of the internal storage).
strcpy(tmpdir, android_media_dir.path);
dirpos = tmpdir + strlen(tmpdir);
d = opendir(tmpdir);
if (d != NULL) {
while ((de = readdir(d))) {
if (de->d_type == DT_DIR) {
const char *name = de->d_name;
/* skip any dir that doesn't start with a number, so not a user */
if (name[0] < '0' || name[0] > '9') {
continue;
}
if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
strcpy(dirpos, name);
if (lookup_media_dir(tmpdir, "Android") == 0
&& lookup_media_dir(tmpdir, "data") == 0) {
//ALOGI("adding cache files from %s\n", tmpdir);
add_cache_files(cache, tmpdir, "cache");
}
} else {
ALOGW("Path exceeds limit: %s%s", tmpdir, name);
}
}
}
closedir(d);
}
clear_cache_files(cache, free_size);
finish_cache_collection(cache);
return data_disk_free() >= free_size ? 0 : -1;
}
int move_dex(const char *src, const char *dst, const char *instruction_set)
{
char src_dex[PKG_PATH_MAX];
char dst_dex[PKG_PATH_MAX];
if (validate_apk_path(src)) return -1;
if (validate_apk_path(dst)) return -1;
if (create_cache_path(src_dex, src, instruction_set)) return -1;
if (create_cache_path(dst_dex, dst, instruction_set)) return -1;
ALOGV("move %s -> %s\n", src_dex, dst_dex);
if (rename(src_dex, dst_dex) < 0) {
ALOGE("Couldn't move %s: %s\n", src_dex, strerror(errno));
return -1;
} else {
return 0;
}
}
int rm_dex(const char *path, const char *instruction_set)
{
char dex_path[PKG_PATH_MAX];
if (validate_apk_path(path)) return -1;
if (create_cache_path(dex_path, path, instruction_set)) return -1;
ALOGV("unlink %s\n", dex_path);
if (unlink(dex_path) < 0) {
ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno));
return -1;
} else {
return 0;
}
}
int get_size(const char *pkgname, userid_t userid, const char *apkpath,
const char *libdirpath, const char *fwdlock_apkpath, const char *asecpath,
const char *instruction_set, int64_t *_codesize, int64_t *_datasize,
int64_t *_cachesize, int64_t* _asecsize)
{
DIR *d;
int dfd;
struct dirent *de;
struct stat s;
char path[PKG_PATH_MAX];
int64_t codesize = 0;
int64_t datasize = 0;
int64_t cachesize = 0;
int64_t asecsize = 0;
/* count the source apk as code -- but only if it's not
* on the /system partition and its not on the sdcard.
*/
if (validate_system_app_path(apkpath) &&
strncmp(apkpath, android_asec_dir.path, android_asec_dir.len) != 0) {
if (stat(apkpath, &s) == 0) {
codesize += stat_size(&s);
}
}
/* count the forward locked apk as code if it is given
*/
if (fwdlock_apkpath != NULL && fwdlock_apkpath[0] != '!') {
if (stat(fwdlock_apkpath, &s) == 0) {
codesize += stat_size(&s);
}
}
/* count the cached dexfile as code */
if (!create_cache_path(path, apkpath, instruction_set)) {
if (stat(path, &s) == 0) {
codesize += stat_size(&s);
}
}
/* add in size of any libraries */
if (libdirpath != NULL && libdirpath[0] != '!') {
d = opendir(libdirpath);
if (d != NULL) {
dfd = dirfd(d);
codesize += calculate_dir_size(dfd);
closedir(d);
}
}
/* compute asec size if it is given
*/
if (asecpath != NULL && asecpath[0] != '!') {
if (stat(asecpath, &s) == 0) {
asecsize += stat_size(&s);
}
}
if (create_pkg_path(path, pkgname, PKG_DIR_POSTFIX, userid)) {
goto done;
}
d = opendir(path);
if (d == NULL) {
goto done;
}
dfd = dirfd(d);
/* most stuff in the pkgdir is data, except for the "cache"
* directory and below, which is cache, and the "lib" directory
* and below, which is code...
*/
while ((de = readdir(d))) {
const char *name = de->d_name;
if (de->d_type == DT_DIR) {
int subfd;
int64_t statsize = 0;
int64_t dirsize = 0;
/* always skip "." and ".." */
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
statsize = stat_size(&s);
}
subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
if (subfd >= 0) {
dirsize = calculate_dir_size(subfd);
}
if(!strcmp(name,"lib")) {
codesize += dirsize + statsize;
} else if(!strcmp(name,"cache")) {
cachesize += dirsize + statsize;
} else {
datasize += dirsize + statsize;
}
} else if (de->d_type == DT_LNK && !strcmp(name,"lib")) {
// This is the symbolic link to the application's library
// code. We'll count this as code instead of data, since
// it is not something that the app creates.
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
codesize += stat_size(&s);
}
} else {
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
datasize += stat_size(&s);
}
}
}
closedir(d);
done:
*_codesize = codesize;
*_datasize = datasize;
*_cachesize = cachesize;
*_asecsize = asecsize;
return 0;
}
int create_cache_path(char path[PKG_PATH_MAX], const char *src, const char *instruction_set)
{
char *tmp;
int srclen;
int dstlen;
srclen = strlen(src);
/* demand that we are an absolute path */
if ((src == 0) || (src[0] != '/') || strstr(src,"..")) {
return -1;
}
if (srclen > PKG_PATH_MAX) { // XXX: PKG_NAME_MAX?
return -1;
}
dstlen = srclen + strlen(DALVIK_CACHE_PREFIX) +
strlen(instruction_set) +
strlen(DALVIK_CACHE_POSTFIX) + 2;
if (dstlen > PKG_PATH_MAX) {
return -1;
}
sprintf(path,"%s%s/%s%s",
DALVIK_CACHE_PREFIX,
instruction_set,
src + 1, /* skip the leading / */
DALVIK_CACHE_POSTFIX);
for(tmp = path + strlen(DALVIK_CACHE_PREFIX) + strlen(instruction_set) + 1; *tmp; tmp++) {
if (*tmp == '/') {
*tmp = '@';
}
}
return 0;
}
static void run_dexopt(int zip_fd, int odex_fd, const char* input_file_name,
const char* output_file_name)
{
/* platform-specific flags affecting optimization and verification */
char dexopt_flags[PROPERTY_VALUE_MAX];
property_get("dalvik.vm.dexopt-flags", dexopt_flags, "");
ALOGV("dalvik.vm.dexopt-flags=%s\n", dexopt_flags);
static const char* DEX_OPT_BIN = "/system/bin/dexopt";
static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig
char zip_num[MAX_INT_LEN];
char odex_num[MAX_INT_LEN];
sprintf(zip_num, "%d", zip_fd);
sprintf(odex_num, "%d", odex_fd);
ALOGV("Running %s in=%s out=%s\n", DEX_OPT_BIN, input_file_name, output_file_name);
execl(DEX_OPT_BIN, DEX_OPT_BIN, "--zip", zip_num, odex_num, input_file_name,
dexopt_flags, (char*) NULL);
ALOGE("execl(%s) failed: %s\n", DEX_OPT_BIN, strerror(errno));
}
static void run_patchoat(int input_fd, int oat_fd, const char* input_file_name,
const char* output_file_name, const char *pkgname, const char *instruction_set)
{
static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig
static const unsigned int MAX_INSTRUCTION_SET_LEN = 32;
static const char* PATCHOAT_BIN = "/system/bin/patchoat";
if (strlen(instruction_set) >= MAX_INSTRUCTION_SET_LEN) {
ALOGE("Instruction set %s longer than max length of %d",
instruction_set, MAX_INSTRUCTION_SET_LEN);
return;
}
/* input_file_name/input_fd should be the .odex/.oat file that is precompiled. I think*/
char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN];
char output_oat_fd_arg[strlen("--output-oat-fd=") + MAX_INT_LEN];
char input_oat_fd_arg[strlen("--input-oat-fd=") + MAX_INT_LEN];
const char* patched_image_location_arg = "--patched-image-location=/system/framework/boot.art";
// The caller has already gotten all the locks we need.
const char* no_lock_arg = "--no-lock-output";
sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set);
sprintf(output_oat_fd_arg, "--output-oat-fd=%d", oat_fd);
sprintf(input_oat_fd_arg, "--input-oat-fd=%d", input_fd);
ALOGE("Running %s isa=%s in-fd=%d (%s) out-fd=%d (%s)\n",
PATCHOAT_BIN, instruction_set, input_fd, input_file_name, oat_fd, output_file_name);
/* patchoat, patched-image-location, no-lock, isa, input-fd, output-fd */
char* argv[7];
argv[0] = (char*) PATCHOAT_BIN;
argv[1] = (char*) patched_image_location_arg;
argv[2] = (char*) no_lock_arg;
argv[3] = instruction_set_arg;
argv[4] = output_oat_fd_arg;
argv[5] = input_oat_fd_arg;
argv[6] = NULL;
execv(PATCHOAT_BIN, (char* const *)argv);
ALOGE("execv(%s) failed: %s\n", PATCHOAT_BIN, strerror(errno));
}
static void run_dex2oat(int zip_fd, int oat_fd, const char* input_file_name,
const char* output_file_name, const char *pkgname, const char *instruction_set)
{
char prop_buf[PROPERTY_VALUE_MAX];
bool profiler = (property_get("dalvik.vm.profiler", prop_buf, "0") > 0) && (prop_buf[0] == '1');
char dex2oat_Xms_flag[PROPERTY_VALUE_MAX];
bool have_dex2oat_Xms_flag = property_get("dalvik.vm.dex2oat-Xms", dex2oat_Xms_flag, NULL) > 0;
char dex2oat_Xmx_flag[PROPERTY_VALUE_MAX];
bool have_dex2oat_Xmx_flag = property_get("dalvik.vm.dex2oat-Xmx", dex2oat_Xmx_flag, NULL) > 0;
char dex2oat_compiler_filter_flag[PROPERTY_VALUE_MAX];
bool have_dex2oat_compiler_filter_flag = property_get("dalvik.vm.dex2oat-filter",
dex2oat_compiler_filter_flag, NULL) > 0;
char dex2oat_flags[PROPERTY_VALUE_MAX];
bool have_dex2oat_flags = property_get("dalvik.vm.dex2oat-flags", dex2oat_flags, NULL) > 0;
ALOGV("dalvik.vm.dex2oat-flags=%s\n", dex2oat_flags);
// If we booting without the real /data, don't spend time compiling.
char vold_decrypt[PROPERTY_VALUE_MAX];
bool have_vold_decrypt = property_get("vold.decrypt", vold_decrypt, "") > 0;
bool skip_compilation = (have_vold_decrypt &&
(strcmp(vold_decrypt, "trigger_restart_min_framework") == 0 ||
(strcmp(vold_decrypt, "1") == 0)));
static const char* DEX2OAT_BIN = "/system/bin/dex2oat";
static const char* RUNTIME_ARG = "--runtime-arg";
static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig
static const unsigned int MAX_INSTRUCTION_SET_LEN = 32;
if (strlen(instruction_set) >= MAX_INSTRUCTION_SET_LEN) {
ALOGE("Instruction set %s longer than max length of %d",
instruction_set, MAX_INSTRUCTION_SET_LEN);
return;
}
char zip_fd_arg[strlen("--zip-fd=") + MAX_INT_LEN];
char zip_location_arg[strlen("--zip-location=") + PKG_PATH_MAX];
char oat_fd_arg[strlen("--oat-fd=") + MAX_INT_LEN];
char oat_location_arg[strlen("--oat-location=") + PKG_PATH_MAX];
char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN];
char profile_file_arg[strlen("--profile-file=") + PKG_PATH_MAX];
char top_k_profile_threshold_arg[strlen("--top-k-profile-threshold=") + PROPERTY_VALUE_MAX];
char dex2oat_Xms_arg[strlen("-Xms") + PROPERTY_VALUE_MAX];
char dex2oat_Xmx_arg[strlen("-Xmx") + PROPERTY_VALUE_MAX];
char dex2oat_compiler_filter_arg[strlen("--compiler-filter=") + PROPERTY_VALUE_MAX];
sprintf(zip_fd_arg, "--zip-fd=%d", zip_fd);
sprintf(zip_location_arg, "--zip-location=%s", input_file_name);
sprintf(oat_fd_arg, "--oat-fd=%d", oat_fd);
sprintf(oat_location_arg, "--oat-location=%s", output_file_name);
sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set);
bool have_profile_file = false;
bool have_top_k_profile_threshold = false;
if (profiler && (strcmp(pkgname, "*") != 0)) {
char profile_file[PKG_PATH_MAX];
snprintf(profile_file, sizeof(profile_file), "%s/%s",
DALVIK_CACHE_PREFIX "profiles", pkgname);
struct stat st;
if ((stat(profile_file, &st) == 0) && (st.st_size > 0)) {
sprintf(profile_file_arg, "--profile-file=%s", profile_file);
have_profile_file = true;
if (property_get("dalvik.vm.profile.top-k-thr", prop_buf, NULL) > 0) {
snprintf(top_k_profile_threshold_arg, sizeof(top_k_profile_threshold_arg),
"--top-k-profile-threshold=%s", prop_buf);
have_top_k_profile_threshold = true;
}
}
}
if (have_dex2oat_Xms_flag) {
sprintf(dex2oat_Xms_arg, "-Xms%s", dex2oat_Xms_flag);
}
if (have_dex2oat_Xmx_flag) {
sprintf(dex2oat_Xmx_arg, "-Xmx%s", dex2oat_Xmx_flag);
}
if (skip_compilation) {
strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=interpret-only");
have_dex2oat_compiler_filter_flag = true;
} else if (have_dex2oat_compiler_filter_flag) {
sprintf(dex2oat_compiler_filter_arg, "--compiler-filter=%s", dex2oat_compiler_filter_flag);
}
ALOGV("Running %s in=%s out=%s\n", DEX2OAT_BIN, input_file_name, output_file_name);
char* argv[7 // program name, mandatory arguments and the final NULL
+ (have_profile_file ? 1 : 0)
+ (have_top_k_profile_threshold ? 1 : 0)
+ (have_dex2oat_Xms_flag ? 2 : 0)
+ (have_dex2oat_Xmx_flag ? 2 : 0)
+ (have_dex2oat_compiler_filter_flag ? 1 : 0)
+ (have_dex2oat_flags ? 1 : 0)];
int i = 0;
argv[i++] = (char*)DEX2OAT_BIN;
argv[i++] = zip_fd_arg;
argv[i++] = zip_location_arg;
argv[i++] = oat_fd_arg;
argv[i++] = oat_location_arg;
argv[i++] = instruction_set_arg;
if (have_profile_file) {
argv[i++] = profile_file_arg;
}
if (have_top_k_profile_threshold) {
argv[i++] = top_k_profile_threshold_arg;
}
if (have_dex2oat_Xms_flag) {
argv[i++] = (char*)RUNTIME_ARG;
argv[i++] = dex2oat_Xms_arg;
}
if (have_dex2oat_Xmx_flag) {
argv[i++] = (char*)RUNTIME_ARG;
argv[i++] = dex2oat_Xmx_arg;
}
if (have_dex2oat_compiler_filter_flag) {
argv[i++] = dex2oat_compiler_filter_arg;
}
if (have_dex2oat_flags) {
argv[i++] = dex2oat_flags;
}
// Do not add after dex2oat_flags, they should override others for debugging.
argv[i] = NULL;
execv(DEX2OAT_BIN, (char* const *)argv);
ALOGE("execl(%s) failed: %s\n", DEX2OAT_BIN, strerror(errno));
}
static int wait_child(pid_t pid)
{
int status;
pid_t got_pid;
while (1) {
got_pid = waitpid(pid, &status, 0);
if (got_pid == -1 && errno == EINTR) {
printf("waitpid interrupted, retrying\n");
} else {
break;
}
}
if (got_pid != pid) {
ALOGW("waitpid failed: wanted %d, got %d: %s\n",
(int) pid, (int) got_pid, strerror(errno));
return 1;
}
if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
return 0;
} else {
return status; /* always nonzero */
}
}
int dexopt(const char *apk_path, uid_t uid, int is_public,
const char *pkgname, const char *instruction_set,
int is_patchoat)
{
struct utimbuf ut;
struct stat input_stat, dex_stat;
char out_path[PKG_PATH_MAX];
char persist_sys_dalvik_vm_lib[PROPERTY_VALUE_MAX];
char *end;
const char *input_file;
char in_odex_path[PKG_PATH_MAX];
int res, input_fd=-1, out_fd=-1;
if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) {
return -1;
}
/* The command to run depend on the value of persist.sys.dalvik.vm.lib */
property_get("persist.sys.dalvik.vm.lib.2", persist_sys_dalvik_vm_lib, "libart.so");
if (is_patchoat && strncmp(persist_sys_dalvik_vm_lib, "libart", 6) != 0) {
/* We may only patch if we are libart */
ALOGE("Patching is only supported in libart\n");
return -1;
}
/* Before anything else: is there a .odex file? If so, we have
* precompiled the apk and there is nothing to do here.
*
* We skip this if we are doing a patchoat.
*/
strcpy(out_path, apk_path);
end = strrchr(out_path, '.');
if (end != NULL && !is_patchoat) {
strcpy(end, ".odex");
if (stat(out_path, &dex_stat) == 0) {
return 0;
}
}
if (create_cache_path(out_path, apk_path, instruction_set)) {
return -1;
}
if (is_patchoat) {
/* /system/framework/whatever.jar -> /system/framework/<isa>/whatever.odex */
strcpy(in_odex_path, apk_path);
end = strrchr(in_odex_path, '/');
if (end == NULL) {
ALOGE("apk_path '%s' has no '/'s in it?!\n", apk_path);
return -1;
}
const char *apk_end = apk_path + (end - in_odex_path); // strrchr(apk_path, '/');
strcpy(end + 1, instruction_set); // in_odex_path now is /system/framework/<isa>\0
strcat(in_odex_path, apk_end);
end = strrchr(in_odex_path, '.');
if (end == NULL) {
return -1;
}
strcpy(end + 1, "odex");
input_file = in_odex_path;
} else {
input_file = apk_path;
}
memset(&input_stat, 0, sizeof(input_stat));
stat(input_file, &input_stat);
input_fd = open(input_file, O_RDONLY, 0);
if (input_fd < 0) {
ALOGE("installd cannot open '%s' for input during dexopt\n", input_file);
return -1;
}
unlink(out_path);
out_fd = open(out_path, O_RDWR | O_CREAT | O_EXCL, 0644);
if (out_fd < 0) {
ALOGE("installd cannot open '%s' for output during dexopt\n", out_path);
goto fail;
}
if (fchmod(out_fd,
S_IRUSR|S_IWUSR|S_IRGRP |
(is_public ? S_IROTH : 0)) < 0) {
ALOGE("installd cannot chmod '%s' during dexopt\n", out_path);
goto fail;
}
if (fchown(out_fd, AID_SYSTEM, uid) < 0) {
ALOGE("installd cannot chown '%s' during dexopt\n", out_path);
goto fail;
}
// Create profile file if there is a package name present.
if (strcmp(pkgname, "*") != 0) {
create_profile_file(pkgname, uid);
}
ALOGV("DexInv: --- BEGIN '%s' ---\n", input_file);
pid_t pid;
pid = fork();
if (pid == 0) {
/* child -- drop privileges before continuing */
if (setgid(uid) != 0) {
ALOGE("setgid(%d) failed in installd during dexopt\n", uid);
exit(64);
}
if (setuid(uid) != 0) {
ALOGE("setuid(%d) failed in installd during dexopt\n", uid);
exit(65);
}
// drop capabilities
struct __user_cap_header_struct capheader;
struct __user_cap_data_struct capdata[2];
memset(&capheader, 0, sizeof(capheader));
memset(&capdata, 0, sizeof(capdata));
capheader.version = _LINUX_CAPABILITY_VERSION_3;
if (capset(&capheader, &capdata[0]) < 0) {
ALOGE("capset failed: %s\n", strerror(errno));
exit(66);
}
if (flock(out_fd, LOCK_EX | LOCK_NB) != 0) {
ALOGE("flock(%s) failed: %s\n", out_path, strerror(errno));
exit(67);
}
if (strncmp(persist_sys_dalvik_vm_lib, "libdvm", 6) == 0) {
run_dexopt(input_fd, out_fd, input_file, out_path);
} else if (strncmp(persist_sys_dalvik_vm_lib, "libart", 6) == 0) {
if (is_patchoat) {
run_patchoat(input_fd, out_fd, input_file, out_path, pkgname, instruction_set);
} else {
run_dex2oat(input_fd, out_fd, input_file, out_path, pkgname, instruction_set);
}
} else {
exit(69); /* Unexpected persist.sys.dalvik.vm.lib value */
}
exit(68); /* only get here on exec failure */
} else {
res = wait_child(pid);
if (res == 0) {
ALOGV("DexInv: --- END '%s' (success) ---\n", input_file);
} else {
ALOGE("DexInv: --- END '%s' --- status=0x%04x, process failed\n", input_file, res);
goto fail;
}
}
ut.actime = input_stat.st_atime;
ut.modtime = input_stat.st_mtime;
utime(out_path, &ut);
close(out_fd);
close(input_fd);
return 0;
fail:
if (out_fd >= 0) {
close(out_fd);
unlink(out_path);
}
if (input_fd >= 0) {
close(input_fd);
}
return -1;
}
void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid,
struct stat* statbuf)
{
while (path[basepos] != 0) {
if (path[basepos] == '/') {
path[basepos] = 0;
if (lstat(path, statbuf) < 0) {
ALOGV("Making directory: %s\n", path);
if (mkdir(path, mode) == 0) {
chown(path, uid, gid);
} else {
ALOGW("Unable to make directory %s: %s\n", path, strerror(errno));
}
}
path[basepos] = '/';
basepos++;
}
basepos++;
}
}
int movefileordir(char* srcpath, char* dstpath, int dstbasepos,
int dstuid, int dstgid, struct stat* statbuf)
{
DIR *d;
struct dirent *de;
int res;
int srcend = strlen(srcpath);
int dstend = strlen(dstpath);
if (lstat(srcpath, statbuf) < 0) {
ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno));
return 1;
}
if ((statbuf->st_mode&S_IFDIR) == 0) {
mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH,
dstuid, dstgid, statbuf);
ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid);
if (rename(srcpath, dstpath) >= 0) {
if (chown(dstpath, dstuid, dstgid) < 0) {
ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno));
unlink(dstpath);
return 1;
}
} else {
ALOGW("Unable to rename %s to %s: %s\n",
srcpath, dstpath, strerror(errno));
return 1;
}
return 0;
}
d = opendir(srcpath);
if (d == NULL) {
ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno));
return 1;
}
res = 0;
while ((de = readdir(d))) {
const char *name = de->d_name;
/* always skip "." and ".." */
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) {
ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name);
continue;
}
if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) {
ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name);
continue;
}
srcpath[srcend] = dstpath[dstend] = '/';
strcpy(srcpath+srcend+1, name);
strcpy(dstpath+dstend+1, name);
if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) {
res = 1;
}
// Note: we will be leaving empty directories behind in srcpath,
// but that is okay, the package manager will be erasing all of the
// data associated with .apks that disappear.
srcpath[srcend] = dstpath[dstend] = 0;
}
closedir(d);
return res;
}
int movefiles()
{
DIR *d;
int dfd, subfd;
struct dirent *de;
struct stat s;
char buf[PKG_PATH_MAX+1];
int bufp, bufe, bufi, readlen;
char srcpkg[PKG_NAME_MAX];
char dstpkg[PKG_NAME_MAX];
char srcpath[PKG_PATH_MAX];
char dstpath[PKG_PATH_MAX];
int dstuid=-1, dstgid=-1;
int hasspace;
d = opendir(UPDATE_COMMANDS_DIR_PREFIX);
if (d == NULL) {
goto done;
}
dfd = dirfd(d);
/* Iterate through all files in the directory, executing the
* file movements requested there-in.
*/
while ((de = readdir(d))) {
const char *name = de->d_name;
if (de->d_type == DT_DIR) {
continue;
} else {
subfd = openat(dfd, name, O_RDONLY);
if (subfd < 0) {
ALOGW("Unable to open update commands at %s%s\n",
UPDATE_COMMANDS_DIR_PREFIX, name);
continue;
}
bufp = 0;
bufe = 0;
buf[PKG_PATH_MAX] = 0;
srcpkg[0] = dstpkg[0] = 0;
while (1) {
bufi = bufp;
while (bufi < bufe && buf[bufi] != '\n') {
bufi++;
}
if (bufi < bufe) {
buf[bufi] = 0;
ALOGV("Processing line: %s\n", buf+bufp);
hasspace = 0;
while (bufp < bufi && isspace(buf[bufp])) {
hasspace = 1;
bufp++;
}
if (buf[bufp] == '#' || bufp == bufi) {
// skip comments and empty lines.
} else if (hasspace) {
if (dstpkg[0] == 0) {
ALOGW("Path before package line in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
} else if (srcpkg[0] == 0) {
// Skip -- source package no longer exists.
} else {
ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg);
if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) &&
!create_move_path(dstpath, dstpkg, buf+bufp, 0)) {
movefileordir(srcpath, dstpath,
strlen(dstpath)-strlen(buf+bufp),
dstuid, dstgid, &s);
}
}
} else {
char* div = strchr(buf+bufp, ':');
if (div == NULL) {
ALOGW("Bad package spec in %s%s; no ':' sep: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
} else {
*div = 0;
div++;
if (strlen(buf+bufp) < PKG_NAME_MAX) {
strcpy(dstpkg, buf+bufp);
} else {
srcpkg[0] = dstpkg[0] = 0;
ALOGW("Package name too long in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
}
if (strlen(div) < PKG_NAME_MAX) {
strcpy(srcpkg, div);
} else {
srcpkg[0] = dstpkg[0] = 0;
ALOGW("Package name too long in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, div);
}
if (srcpkg[0] != 0) {
if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) {
if (lstat(srcpath, &s) < 0) {
// Package no longer exists -- skip.
srcpkg[0] = 0;
}
} else {
srcpkg[0] = 0;
ALOGW("Can't create path %s in %s%s\n",
div, UPDATE_COMMANDS_DIR_PREFIX, name);
}
if (srcpkg[0] != 0) {
if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) {
if (lstat(dstpath, &s) == 0) {
dstuid = s.st_uid;
dstgid = s.st_gid;
} else {
// Destination package doesn't
// exist... due to original-package,
// this is normal, so don't be
// noisy about it.
srcpkg[0] = 0;
}
} else {
srcpkg[0] = 0;
ALOGW("Can't create path %s in %s%s\n",
div, UPDATE_COMMANDS_DIR_PREFIX, name);
}
}
ALOGV("Transfering from %s to %s: uid=%d\n",
srcpkg, dstpkg, dstuid);
}
}
}
bufp = bufi+1;
} else {
if (bufp == 0) {
if (bufp < bufe) {
ALOGW("Line too long in %s%s, skipping: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf);
}
} else if (bufp < bufe) {
memcpy(buf, buf+bufp, bufe-bufp);
bufe -= bufp;
bufp = 0;
}
readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe);
if (readlen < 0) {
ALOGW("Failure reading update commands in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno));
break;
} else if (readlen == 0) {
break;
}
bufe += readlen;
buf[bufe] = 0;
ALOGV("Read buf: %s\n", buf);
}
}
close(subfd);
}
}
closedir(d);
done:
return 0;
}
int linklib(const char* pkgname, const char* asecLibDir, int userId)
{
char pkgdir[PKG_PATH_MAX];
char libsymlink[PKG_PATH_MAX];
struct stat s, libStat;
int rc = 0;
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userId)) {
ALOGE("cannot create package path\n");
return -1;
}
if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userId)) {
ALOGE("cannot create package lib symlink origin path\n");
return -1;
}
if (stat(pkgdir, &s) < 0) return -1;
if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) {
ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno));
return -1;
}
if (chmod(pkgdir, 0700) < 0) {
ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
rc = -1;
goto out;
}
if (lstat(libsymlink, &libStat) < 0) {
if (errno != ENOENT) {
ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
rc = -1;
goto out;
}
} else {
if (S_ISDIR(libStat.st_mode)) {
if (delete_dir_contents(libsymlink, 1, NULL) < 0) {
rc = -1;
goto out;
}
} else if (S_ISLNK(libStat.st_mode)) {
if (unlink(libsymlink) < 0) {
ALOGE("couldn't unlink lib dir: %s\n", strerror(errno));
rc = -1;
goto out;
}
}
}
if (symlink(asecLibDir, libsymlink) < 0) {
ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir,
strerror(errno));
rc = -errno;
goto out;
}
out:
if (chmod(pkgdir, s.st_mode) < 0) {
ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
rc = -errno;
}
if (chown(pkgdir, s.st_uid, s.st_gid) < 0) {
ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno));
return -errno;
}
return rc;
}
static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd)
{
static const char *IDMAP_BIN = "/system/bin/idmap";
static const size_t MAX_INT_LEN = 32;
char idmap_str[MAX_INT_LEN];
snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd);
execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL);
ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno));
}
// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix)
// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap
static int flatten_path(const char *prefix, const char *suffix,
const char *overlay_path, char *idmap_path, size_t N)
{
if (overlay_path == NULL || idmap_path == NULL) {
return -1;
}
const size_t len_overlay_path = strlen(overlay_path);
// will access overlay_path + 1 further below; requires absolute path
if (len_overlay_path < 2 || *overlay_path != '/') {
return -1;
}
const size_t len_idmap_root = strlen(prefix);
const size_t len_suffix = strlen(suffix);
if (SIZE_MAX - len_idmap_root < len_overlay_path ||
SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) {
// additions below would cause overflow
return -1;
}
if (N < len_idmap_root + len_overlay_path + len_suffix) {
return -1;
}
memset(idmap_path, 0, N);
snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix);
char *ch = idmap_path + len_idmap_root;
while (*ch != '\0') {
if (*ch == '/') {
*ch = '@';
}
++ch;
}
return 0;
}
int idmap(const char *target_apk, const char *overlay_apk, uid_t uid)
{
ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid);
int idmap_fd = -1;
char idmap_path[PATH_MAX];
if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk,
idmap_path, sizeof(idmap_path)) == -1) {
ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk);
goto fail;
}
unlink(idmap_path);
idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644);
if (idmap_fd < 0) {
ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno));
goto fail;
}
if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) {
ALOGE("idmap cannot chown '%s'\n", idmap_path);
goto fail;
}
if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) {
ALOGE("idmap cannot chmod '%s'\n", idmap_path);
goto fail;
}
pid_t pid;
pid = fork();
if (pid == 0) {
/* child -- drop privileges before continuing */
if (setgid(uid) != 0) {
ALOGE("setgid(%d) failed during idmap\n", uid);
exit(1);
}
if (setuid(uid) != 0) {
ALOGE("setuid(%d) failed during idmap\n", uid);
exit(1);
}
if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) {
ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno));
exit(1);
}
run_idmap(target_apk, overlay_apk, idmap_fd);
exit(1); /* only if exec call to idmap failed */
} else {
int status = wait_child(pid);
if (status != 0) {
ALOGE("idmap failed, status=0x%04x\n", status);
goto fail;
}
}
close(idmap_fd);
return 0;
fail:
if (idmap_fd >= 0) {
close(idmap_fd);
unlink(idmap_path);
}
return -1;
}
int restorecon_data(const char* pkgName, const char* seinfo, uid_t uid)
{
struct dirent *entry;
DIR *d;
struct stat s;
char *userdir;
char *primarydir;
char *pkgdir;
int ret = 0;
// SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here.
unsigned int flags = SELINUX_ANDROID_RESTORECON_RECURSE;
if (!pkgName || !seinfo) {
ALOGE("Package name or seinfo tag is null when trying to restorecon.");
return -1;
}
if (asprintf(&primarydir, "%s%s%s", android_data_dir.path, PRIMARY_USER_PREFIX, pkgName) < 0) {
return -1;
}
// Relabel for primary user.
if (selinux_android_restorecon_pkgdir(primarydir, seinfo, uid, flags) < 0) {
ALOGE("restorecon failed for %s: %s\n", primarydir, strerror(errno));
ret |= -1;
}
if (asprintf(&userdir, "%s%s", android_data_dir.path, SECONDARY_USER_PREFIX) < 0) {
free(primarydir);
return -1;
}
// Relabel package directory for all secondary users.
d = opendir(userdir);
if (d == NULL) {
free(primarydir);
free(userdir);
return -1;
}
while ((entry = readdir(d))) {
if (entry->d_type != DT_DIR) {
continue;
}
const char *user = entry->d_name;
// Ignore "." and ".."
if (!strcmp(user, ".") || !strcmp(user, "..")) {
continue;
}
// user directories start with a number
if (user[0] < '0' || user[0] > '9') {
ALOGE("Expecting numbered directory during restorecon. Instead got '%s'.", user);
continue;
}
if (asprintf(&pkgdir, "%s%s/%s", userdir, user, pkgName) < 0) {
continue;
}
if (stat(pkgdir, &s) < 0) {
free(pkgdir);
continue;
}
if (selinux_android_restorecon_pkgdir(pkgdir, seinfo, uid, flags) < 0) {
ALOGE("restorecon failed for %s: %s\n", pkgdir, strerror(errno));
ret |= -1;
}
free(pkgdir);
}
closedir(d);
free(primarydir);
free(userdir);
return ret;
}
static int prune_dex_exclusion_predicate(const char *file_name, const int is_dir)
{
// Exclude all directories. The top level command will be
// given a list of ISA specific directories that are assumed
// to be flat.
if (is_dir) {
return 1;
}
// Don't exclude regular files that start with the list
// of prefixes.
static const char data_app_prefix[] = "data@app@";
static const char data_priv_app_prefix[] = "data@priv-app@";
if (!strncmp(file_name, data_app_prefix, sizeof(data_app_prefix) - 1) ||
!strncmp(file_name, data_priv_app_prefix, sizeof(data_priv_app_prefix) - 1)) {
return 0;
}
// Exclude all regular files that don't start with the prefix "data@app@" or
// "data@priv-app@".
return 1;
}
int prune_dex_cache(const char* subdir) {
// "." is handled as a special case, and refers to
// DALVIK_CACHE_PREFIX (usually /data/dalvik-cache).
const bool is_dalvik_cache_root = !strcmp(subdir, ".");
// Don't allow the path to contain "." or ".." except for the
// special case above. This is much stricter than we need to be,
// but there's no good reason to support them.
if (strchr(subdir, '.' ) != NULL && !is_dalvik_cache_root) {
return -1;
}
if (!is_dalvik_cache_root) {
char full_path[PKG_PATH_MAX];
snprintf(full_path, sizeof(full_path), "%s%s", DALVIK_CACHE_PREFIX, subdir);
return delete_dir_contents(full_path, 0, &prune_dex_exclusion_predicate);
}
// When subdir == ".", clean the contents of the top level
// dalvik-cache directory.
return delete_dir_contents(DALVIK_CACHE_PREFIX, 0, &prune_dex_exclusion_predicate);
}
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